Iran's Revolutionary Guard had said it shot down what it identified as a RQ-4 Global Hawk that had entered its airspace near the Kouhmobarak district in southern Iran's Hormozgan province earlier this morning.

However, a US official said that the high-altitude drone - a US Navy MQ-4C Triton - was shot down by Iranian surface-to-air missile over the Strait of Hormuz in international airspace.

BREAKING: U.S. Navy MQ-4C Triton high-altitude drone shot down by Iranian surface-to-air missile this evening over Strait of Hormuz in international airspace: U.S. official